Dick’s Sporting Goods announced on Wednesday that it would stop selling assault-style rifles in all of its stores, a direct reaction to the February 14 high school shooting in Parkland, Florida, that left 17 dead.&nbsp;

Already grappling with upstart rivals and the rise of e-commerce, personal-care and packaged-foods makers now face the threat of voice-search assistants that often offer customers just one or two product options.